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Email authentication
SPF
A comprehensive collection of questions and answers about SPF email authentication from email marketers, experts and technical documentation.
What SPF mechanism includes the A records of a domain?
What happens if an SPF record is missing?
Does SPF protect against display name spoofing?
What is the significance of the 'v=spf1' tag?
What SPF mechanism includes the MX records of a domain?
Can an SPF record use both 'ip4' and 'ip6' mechanisms?
What SPF qualifier denotes a neutral result?
What is the maximum length of an SPF TXT record string?
Does the 'exists' mechanism in SPF check for a record's existence?
What SPF mechanism refers to another domain's SPF record?
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